US20200028131A1 - Battery module and battery pack including the same - Google Patents
Battery module and battery pack including the same Download PDFInfo
- Publication number
- US20200028131A1 US20200028131A1 US16/337,771 US201816337771A US2020028131A1 US 20200028131 A1 US20200028131 A1 US 20200028131A1 US 201816337771 A US201816337771 A US 201816337771A US 2020028131 A1 US2020028131 A1 US 2020028131A1
- Authority
- US
- United States
- Prior art keywords
- case
- wall
- battery
- battery module
- battery cells
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- H01M2/1077—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present disclosure relates to a battery module and a battery pack including the battery module, and more particularly, to a battery module capable of improving the cooling efficiency and a battery pack including the battery module.
- a nickel-cadmium battery or a hydrogen ion battery has been used as the secondary battery.
- a lithium secondary battery is recently widely used because charging and discharging is free due to rare memory effect in comparison with a nickel-based secondary battery, a self-discharge rate is very low, and an energy density is high.
- the lithium secondary battery mainly uses a lithium oxide and a carbonaceous material as a positive electrode active material and a negative electrode active material, respectively.
- the lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate, respectively coated with the positive electrode active material and the negative electrode active material, are arranged with a separator therebetween, and an outer member, that is a battery case, which seals and receives the electrode assembly together with an electrolyte solution.
- the lithium secondary battery includes a positive electrode, a negative electrode, and a separator interposed therebetween and an electrolyte.
- the lithium secondary battery is classified into a lithium ion battery (LIB) and a polymer lithium ion battery (PLIB).
- LIB lithium ion battery
- PKIB polymer lithium ion battery
- an electrode of the lithium secondary battery is prepared by applying the positive or negative electrode active material to a current collector made of aluminum or copper sheet, mesh, film, foil, or the like and then drying the same.
- the lithium secondary battery is currently in the limelight due to its advantages such as high operating voltage and high energy density, but it is one of important tasks to cool the lithium secondary battery since heat is generated while the lithium secondary battery is being charged or used.
- Korean Unexamined Patent Publication No. 10-2014-0057696 discloses a structure in which an insulating liquid is filled in a battery case and is circulated to cool a battery module.
- battery cells are disposed at the center of the battery case, and the flow of the insulating liquid is disturbed since the insulating liquid collides with the battery cells while circulating.
- the insulating liquid may not circulate smoothly, and thus the cooling performance of the entire battery module is poor.
- the present disclosure is directed to providing a battery module that allows a fluid to smoothly circulate in a case, and a battery pack including the battery module.
- the present disclosure is also directed to providing a battery module that may have improved cooling performance since the fluid is in direct contact with the battery cell, and a battery pack including the battery module.
- the present disclosure is also directed to providing a battery module that may have a reduced entire volume and an improved energy density, and a battery pack including the battery module.
- a battery module comprising: a case having a wall disposed therein to form a channel along which a fluid circulates; and a plurality of battery cells disposed in the case, wherein the wall is disposed between a pair of neighboring battery cells among the plurality of battery cells, and the fluid flows in through an inlet of the case, circulates between the plurality of battery cells along the wall, and flows out through an outlet of the case.
- the wall may include a first wall extending from one side of the case and spaced apart from the other side of the case, which is opposite to the one side.
- the wall may include a second wall extending from the other side of the case and spaced apart from one side of the case, which is opposite to the other side.
- first wall and the second wall may be spaced apart by a preset gap.
- first wall and the second wall may be provided in plural, and the first walls and the second walls may be disposed alternately.
- the battery module may further comprise a connection member configured to connect neighboring battery cells to each other and having a rounded portion at a region that comes into contact with the fluid.
- a battery pack including the battery module described above, and there is also provided a vehicle including the battery module.
- a fluid may smoothly circulate in the case along a channel formed at a wall disposed in the case.
- a heat transfer member such as a cooling plate and a thermal interface material (TIM)
- TIM thermal interface material
- FIG. 1 is a perspective view showing an entire battery module according to the first embodiment of the present disclosure.
- FIG. 2 is a cross-sectioned view showing that a channel is formed by disposing walls to a case employed at the battery module according to the first embodiment of the present disclosure, observed from the above.
- FIG. 3 is a cross-sectioned view showing the battery module according to the first embodiment of the present disclosure, observed from the above.
- FIG. 4 is a cross-sectioned view showing that a connection member is coupled to the battery cells in the battery module according to the first embodiment of the present disclosure.
- FIG. 5 is a cross-sectioned view showing a battery module according to the second embodiment of the present disclosure, observed from the above.
- FIG. 6 is a perspective view showing an entire battery module according to the third embodiment of the present disclosure.
- combine or ‘connect’ as used herein, may refer not only to a case where one member and another member are directly combined or directly connected but also a case where one member is indirectly combined with another member via a connecting member or is indirectly connected.
- FIG. 1 is a perspective view showing an entire battery module according to the first embodiment of the present disclosure
- FIG. 2 is a cross-sectioned view showing that a channel is formed by disposing walls to a case employed at the battery module according to the first embodiment of the present disclosure, observed from the above
- FIG. 3 is a cross-sectioned view showing the battery module according to the first embodiment of the present disclosure, observed from the above.
- a battery module 10 according to the first embodiment of the present disclosure includes a case 100 and battery cells 200 .
- the case 100 has a channel formed therein so that a fluid may circulate therethrough.
- the fluid may be provided in various ways to cool the battery cells 200 in contact with the battery cells 200 .
- the fluid will be described as a cooling oil 400 for convenience of explanation.
- the channel is formed in various ways in the case 100 so that the cooling oil 400 may circulate therethrough.
- a wall 300 is disposed inside the case 100 to form a channel capable of circulating the cooling oil 400 .
- the wall 300 may be provided in various numbers. However, the case where one wall 300 is provided will be described later in the second embodiment, and the case where a plurality of walls 300 are provided will be described in the first embodiment.
- the wall 300 is disposed inside the case 100 to partition the inside of the case 100 and has a channel therein through which the cooling oil 400 may move.
- the wall 300 may include a first wall 310 and a second wall 320 .
- the first wall 310 is formed to extend from one side 110 of the case and spaced apart from the other side 120 of the case, which is opposite to one side.
- the second wall 320 is formed to extend from the other side 120 of the case and spaced apart from one side 110 of the case, which is opposite the other side.
- the size of the space between the wall 300 and the case 100 may be set variously.
- the first wall 310 and the second wall 320 may be spaced apart by a preset gap.
- the walls 310 , 320 are disposed to be interposed between a pair of neighboring battery cells 200 among the plurality of battery cells 200 , and the battery cells 200 are coupled to and supported by the walls 310 , 320 . That is, referring to FIGS. 2 and 3 , if the cooling oil 400 moves along the first wall 310 and the second wall 320 , the cooling oil 400 may come into direct contact with the battery cells 200 coupled to the wall 300 , and thus the cooling oil 400 may directly cool the battery cells 200 .
- the cooling oil 400 flowing in along a direction of an arrow A through an inlet 500 of the case 100 circulates between the plurality of battery cells 200 along the wall 300 and flows out along a direction of an arrow B through an outlet 600 of the case 100 .
- the cooling oil 400 may move through the space between the first wall 310 and the other side 120 of the case.
- the second wall 320 is spaced apart from one side 110 of the case, the cooling oil 400 may move through the space between the second wall 320 and one side 110 of the case.
- the cooling oil 400 flowing into the case 100 through the inlet 500 of the case 100 flows along the first wall 310 and the second wall 320 to cool the battery cells 200 disposed inside the case 100 , and then flows out through the outlet 600 of the case 100 .
- the cooling oil 400 flows along the channel formed by the walls 300 , different from the conventional technique, and thus the flow of the cooling oil 400 is not disturbed by the battery cells 200 .
- the cooling oil 400 may come into direct contact with the battery cells 200 to efficiently cool the battery cells 200 .
- the first wall 310 and the second wall 320 may be respectively provided in the case 100 in single or in plural. Referring to FIG. 2 , three first walls 310 and two second walls 320 are disposed alternately so that the cooling oil 400 may circulate as if it rotates while reciprocating between an end of one side 110 of the case and an end of the other side 120 of the case.
- the number of the first wall 310 and the second wall 320 may be set more variously. As shown in FIG. 2 , if the total number of the first walls 310 and the second walls 320 is an odd number, the inlet 500 of the case 100 and the outlet 600 of the case 100 may be formed in the same direction. However, if the total number of the first walls 310 and the second walls 320 is an even number, the inlet 500 of the case 100 and the outlet 600 of the case 100 may be formed in different directions.
- the plurality of battery cells 200 are disposed inside the case 100 .
- the battery cells 200 are coupled to the wall 300 so that a channel through which the cooling oil 400 may circulate is formed inside the case 100 , and, referring to FIG. 3 , the cooling oil 400 is capable of moving between the plurality of battery cells 200 .
- the battery cell 200 may have various structures.
- the battery cell 200 may be configured so that a plurality of unit cells, in each of which a positive electrode plate, a separator and a negative electrode plate are arranged in order, or a plurality of bi-cells, in each of which a positive electrode plate, a separator, a negative electrode plate, a separator, a positive electrode plate, a separator and a negative electrode plate are arranged in order, are stacked suitable for a battery capacity.
- the battery cell 200 may have an electrode lead.
- the electrode lead is a type of terminal that is exposed to the outside and connected to an external device, and the electrode lead may be made of a conductive material.
- the electrode lead may include a positive electrode lead and a negative electrode lead.
- the positive electrode lead and the negative electrode lead may be disposed in opposite directions with respect to the longitudinal direction of the battery cell 200 , or the positive electrode lead and the negative electrode lead may be positioned in the same direction with respect to the longitudinal direction of the battery cell 200 .
- FIG. 4 is a cross-sectioned view showing that a connection member is coupled to the battery cells in the battery module according to the first embodiment of the present disclosure.
- a connection member 700 may connect a pair of neighboring battery cells 200 a , 200 b to each other, and the pair of battery cells 200 a , 200 b may be supported by the connection member 700 .
- the connection member 700 may have a rounded portion 710 formed at a region in contact with the cooling oil 400 . If the rounded portion 710 is formed at the connection member 700 as above, the cooling oil 400 moves along the rounded portion 710 of the connection member 700 while circulating, thereby reducing a the relative resistance. Accordingly, the cooling oil 400 may circulate more smoothly.
- the first wall 310 extending from one side 110 of the case and spaced apart from the other side 120 of the case and the second wall 320 extending from the other side 120 of the case and spaced apart from one side 110 of the case may be disposed alternately.
- the battery cells 200 are coupled to and supported by the wall 300 .
- the cooling oil 400 flowing into the case 100 through the inlet 500 of the case 100 circulates along the first wall 310 and the second wall 320 and directly contacts the battery cells 200 to cool the battery cells 200 , and then flows out of the case 100 through the outlet 600 of the case 100 .
- a new cooling oil 400 may flow into the case 100 again, or the cooling oil 400 flowing out of the case 100 may be cooled through the heat transfer and then flow into the case 100 again.
- various methods may be used to circulate the cooling oil 400 , and, for example, a pump may be combined.
- the circulation method of the cooling oil 400 is not limited thereto.
- FIG. 5 is a cross-sectioned view showing a battery module according to the second embodiment of the present disclosure, observed from the above.
- the second embodiment of the present disclosure is different from the first embodiment in the point that a single wall 300 is provided to form a channel.
- the cooling oil 400 flowing into the case 100 through the inlet 500 of the case 100 moves along the wall 300 to a side opposite to the inlet 500 of the case 100 through the space between the battery cells 200 , and moves through the space formed between the side opposite to the inlet 500 of the case 100 and the wall 300 , and flows out of the case 100 through the outlet 600 of the case 100 .
- the cooling oil 400 cools the battery cells 200 in direct contact thereto.
- FIG. 6 is a perspective view showing an entire battery module according to the third embodiment of the present disclosure.
- the third embodiment of the present disclosure is different from the first and second embodiments in the point that the inlet 500 and the outlet 600 formed at the case 100 are provided in plural.
- the cooling oil 400 is a fluid, if the inlet 500 and the outlet 600 are formed in single, the cooling oil 400 may not smoothly circulate depending on the size of the case 100 , or turbulence may be generated in the flow of the cooling oil 400 inside the case 100 .
- a plurality of inlets 500 and outlets 600 may be formed at the case 100 .
- the inlet 500 and the outlet 600 are provided in plural, respectively, and they may be formed vertically based on FIG. 6 . Even though two inlets 500 and two outlets 600 are provided in FIG. 6 , more inlets 500 and outlets 600 may be used as necessary, without being limited to the above.
- the arrangement of the inlet 500 and the outlet 600 is not limited to the vertical form but may be provided in more various ways.
- a battery pack (not shown) according to an embodiment of the present disclosure, may include one or more battery modules 10 according to an embodiment of the present disclosure as described above. Also, in addition to the battery modules 10 , the battery pack (not shown) may further includes a case 100 for accommodating the battery modules 10 , and various devices for controlling charge and discharge of the battery modules 10 , such as a BMS, a current sensor, a fuse, and the like.
- a vehicle (not shown) may include the battery module 10 or the battery pack (not shown) described above, and the battery pack (not shown) may include the battery module 10 .
- the battery module 10 according to an embodiment of the present disclosure may be applied to the vehicle (not shown), for example, a predetermined vehicle (not shown) provided to use electricity like an electric vehicle or a hybrid electric vehicle.
- the present disclosure is directed to a battery module and a battery pack including the battery module, and is particularly applicable to industries associated with a secondary battery.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
- The present application claims priority to Korean Patent Application No. 10-2017-0045405 filed on Apr. 7, 2017 in the Republic of Korea, the disclosures of which are incorporated herein by reference.
- The present disclosure relates to a battery module and a battery pack including the battery module, and more particularly, to a battery module capable of improving the cooling efficiency and a battery pack including the battery module.
- As technology development and demand for a mobile device have increased, demand for a secondary battery as an energy source has rapidly increased. Conventionally, a nickel-cadmium battery or a hydrogen ion battery has been used as the secondary battery. However, a lithium secondary battery is recently widely used because charging and discharging is free due to rare memory effect in comparison with a nickel-based secondary battery, a self-discharge rate is very low, and an energy density is high.
- The lithium secondary battery mainly uses a lithium oxide and a carbonaceous material as a positive electrode active material and a negative electrode active material, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate, respectively coated with the positive electrode active material and the negative electrode active material, are arranged with a separator therebetween, and an outer member, that is a battery case, which seals and receives the electrode assembly together with an electrolyte solution.
- The lithium secondary battery includes a positive electrode, a negative electrode, and a separator interposed therebetween and an electrolyte. Depending on which material is used for the positive electrode active material and the negative electrode active material, the lithium secondary battery is classified into a lithium ion battery (LIB) and a polymer lithium ion battery (PLIB). Generally, an electrode of the lithium secondary battery is prepared by applying the positive or negative electrode active material to a current collector made of aluminum or copper sheet, mesh, film, foil, or the like and then drying the same.
- The lithium secondary battery is currently in the limelight due to its advantages such as high operating voltage and high energy density, but it is one of important tasks to cool the lithium secondary battery since heat is generated while the lithium secondary battery is being charged or used.
- In relation to the prior art, Korean Unexamined Patent Publication No. 10-2014-0057696 discloses a structure in which an insulating liquid is filled in a battery case and is circulated to cool a battery module. However, in this document, battery cells are disposed at the center of the battery case, and the flow of the insulating liquid is disturbed since the insulating liquid collides with the battery cells while circulating. Thus, the insulating liquid may not circulate smoothly, and thus the cooling performance of the entire battery module is poor.
- The present disclosure is directed to providing a battery module that allows a fluid to smoothly circulate in a case, and a battery pack including the battery module.
- The present disclosure is also directed to providing a battery module that may have improved cooling performance since the fluid is in direct contact with the battery cell, and a battery pack including the battery module.
- The present disclosure is also directed to providing a battery module that may have a reduced entire volume and an improved energy density, and a battery pack including the battery module.
- In one aspect of the present disclosure, there is provided a battery module, comprising: a case having a wall disposed therein to form a channel along which a fluid circulates; and a plurality of battery cells disposed in the case, wherein the wall is disposed between a pair of neighboring battery cells among the plurality of battery cells, and the fluid flows in through an inlet of the case, circulates between the plurality of battery cells along the wall, and flows out through an outlet of the case.
- Also, the wall may include a first wall extending from one side of the case and spaced apart from the other side of the case, which is opposite to the one side.
- In addition, the wall may include a second wall extending from the other side of the case and spaced apart from one side of the case, which is opposite to the other side.
- Also, the first wall and the second wall may be spaced apart by a preset gap.
- In addition, the first wall and the second wall may be provided in plural, and the first walls and the second walls may be disposed alternately.
- Also, the battery module may further comprise a connection member configured to connect neighboring battery cells to each other and having a rounded portion at a region that comes into contact with the fluid.
- Meanwhile, in another aspect of the present disclosure, there is also provided a battery pack including the battery module described above, and there is also provided a vehicle including the battery module.
- According to the embodiments of the present disclosure, a fluid may smoothly circulate in the case along a channel formed at a wall disposed in the case.
- In addition, since the fluid is in direct contact with the battery cell while smoothly circulating in the case, it is possible to improve the cooling performance.
- Moreover, since a heat transfer member such as a cooling plate and a thermal interface material (TIM) is not used, the overall volume of the battery module is reduced, and battery cells may be additionally disposed at the position where the heat transfer member is used, thereby improving the energy density.
-
FIG. 1 is a perspective view showing an entire battery module according to the first embodiment of the present disclosure. -
FIG. 2 is a cross-sectioned view showing that a channel is formed by disposing walls to a case employed at the battery module according to the first embodiment of the present disclosure, observed from the above. -
FIG. 3 is a cross-sectioned view showing the battery module according to the first embodiment of the present disclosure, observed from the above. -
FIG. 4 is a cross-sectioned view showing that a connection member is coupled to the battery cells in the battery module according to the first embodiment of the present disclosure. -
FIG. 5 is a cross-sectioned view showing a battery module according to the second embodiment of the present disclosure, observed from the above. -
FIG. 6 is a perspective view showing an entire battery module according to the third embodiment of the present disclosure. - Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to the description, it should be understood that the terms used in the specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Therefore, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that other equivalents and modifications could be made thereto without departing from the scope of the disclosure.
- In the drawings, the size of each element or a specific part of the element may be exaggerated, omitted, or schematically illustrated for convenience and clarity of a description. Thus, the size of each element does not entirely reflect the actual size of the element. A detailed description of well-known functions or elements associated with the present disclosure will be omitted if it unnecessarily obscures the subject matter of the present disclosure.
- The term, ‘combine’ or ‘connect’ as used herein, may refer not only to a case where one member and another member are directly combined or directly connected but also a case where one member is indirectly combined with another member via a connecting member or is indirectly connected.
-
FIG. 1 is a perspective view showing an entire battery module according to the first embodiment of the present disclosure,FIG. 2 is a cross-sectioned view showing that a channel is formed by disposing walls to a case employed at the battery module according to the first embodiment of the present disclosure, observed from the above, andFIG. 3 is a cross-sectioned view showing the battery module according to the first embodiment of the present disclosure, observed from the above. - Referring to
FIGS. 1 to 3 , abattery module 10 according to the first embodiment of the present disclosure includes acase 100 andbattery cells 200. - The
case 100 has a channel formed therein so that a fluid may circulate therethrough. Here, the fluid may be provided in various ways to cool thebattery cells 200 in contact with thebattery cells 200. Hereinafter, the fluid will be described as acooling oil 400 for convenience of explanation. However, it should be noted that the fluid is not limited to thecooling oil 400 due to the description. In addition, the channel is formed in various ways in thecase 100 so that thecooling oil 400 may circulate therethrough. Referring toFIG. 2 , awall 300 is disposed inside thecase 100 to form a channel capable of circulating thecooling oil 400. Thewall 300 may be provided in various numbers. However, the case where onewall 300 is provided will be described later in the second embodiment, and the case where a plurality ofwalls 300 are provided will be described in the first embodiment. - The
wall 300 is disposed inside thecase 100 to partition the inside of thecase 100 and has a channel therein through which thecooling oil 400 may move. Referring toFIG. 2 , thewall 300 may include afirst wall 310 and asecond wall 320. Thefirst wall 310 is formed to extend from oneside 110 of the case and spaced apart from theother side 120 of the case, which is opposite to one side. In addition, thesecond wall 320 is formed to extend from theother side 120 of the case and spaced apart from oneside 110 of the case, which is opposite the other side. Here, the size of the space between thewall 300 and thecase 100 may be set variously. In addition, thefirst wall 310 and thesecond wall 320 may be spaced apart by a preset gap. - Referring to
FIG. 3 , thewalls battery cells 200 among the plurality ofbattery cells 200, and thebattery cells 200 are coupled to and supported by thewalls FIGS. 2 and 3 , if thecooling oil 400 moves along thefirst wall 310 and thesecond wall 320, thecooling oil 400 may come into direct contact with thebattery cells 200 coupled to thewall 300, and thus thecooling oil 400 may directly cool thebattery cells 200. - For example, referring to
FIGS. 2 and 3 , the coolingoil 400 flowing in along a direction of an arrow A through aninlet 500 of thecase 100 circulates between the plurality ofbattery cells 200 along thewall 300 and flows out along a direction of an arrow B through anoutlet 600 of thecase 100. Here, since thefirst wall 310 is spaced apart from theother side 120 of the case, the coolingoil 400 may move through the space between thefirst wall 310 and theother side 120 of the case. Also, since thesecond wall 320 is spaced apart from oneside 110 of the case, the coolingoil 400 may move through the space between thesecond wall 320 and oneside 110 of the case. - In this way, the cooling
oil 400 flowing into thecase 100 through theinlet 500 of thecase 100 flows along thefirst wall 310 and thesecond wall 320 to cool thebattery cells 200 disposed inside thecase 100, and then flows out through theoutlet 600 of thecase 100. In thebattery module 10 according to the first embodiment of the present disclosure, the coolingoil 400 flows along the channel formed by thewalls 300, different from the conventional technique, and thus the flow of the coolingoil 400 is not disturbed by thebattery cells 200. Thus, the coolingoil 400 may come into direct contact with thebattery cells 200 to efficiently cool thebattery cells 200. - The
first wall 310 and thesecond wall 320 may be respectively provided in thecase 100 in single or in plural. Referring toFIG. 2 , threefirst walls 310 and twosecond walls 320 are disposed alternately so that the coolingoil 400 may circulate as if it rotates while reciprocating between an end of oneside 110 of the case and an end of theother side 120 of the case. The number of thefirst wall 310 and thesecond wall 320 may be set more variously. As shown inFIG. 2 , if the total number of thefirst walls 310 and thesecond walls 320 is an odd number, theinlet 500 of thecase 100 and theoutlet 600 of thecase 100 may be formed in the same direction. However, if the total number of thefirst walls 310 and thesecond walls 320 is an even number, theinlet 500 of thecase 100 and theoutlet 600 of thecase 100 may be formed in different directions. - The plurality of
battery cells 200 are disposed inside thecase 100. Thebattery cells 200 are coupled to thewall 300 so that a channel through which the coolingoil 400 may circulate is formed inside thecase 100, and, referring toFIG. 3 , the coolingoil 400 is capable of moving between the plurality ofbattery cells 200. - The
battery cell 200 may have various structures. Thebattery cell 200 may be configured so that a plurality of unit cells, in each of which a positive electrode plate, a separator and a negative electrode plate are arranged in order, or a plurality of bi-cells, in each of which a positive electrode plate, a separator, a negative electrode plate, a separator, a positive electrode plate, a separator and a negative electrode plate are arranged in order, are stacked suitable for a battery capacity. - The
battery cell 200 may have an electrode lead. The electrode lead is a type of terminal that is exposed to the outside and connected to an external device, and the electrode lead may be made of a conductive material. The electrode lead may include a positive electrode lead and a negative electrode lead. The positive electrode lead and the negative electrode lead may be disposed in opposite directions with respect to the longitudinal direction of thebattery cell 200, or the positive electrode lead and the negative electrode lead may be positioned in the same direction with respect to the longitudinal direction of thebattery cell 200. -
FIG. 4 is a cross-sectioned view showing that a connection member is coupled to the battery cells in the battery module according to the first embodiment of the present disclosure. - Referring to
FIG. 4 , aconnection member 700 may connect a pair of neighboringbattery cells battery cells connection member 700. In addition, theconnection member 700 may have a roundedportion 710 formed at a region in contact with the coolingoil 400. If therounded portion 710 is formed at theconnection member 700 as above, the coolingoil 400 moves along therounded portion 710 of theconnection member 700 while circulating, thereby reducing a the relative resistance. Accordingly, the coolingoil 400 may circulate more smoothly. - Hereinafter, the operation and effects of the
battery module 10 according to the first embodiment of the present disclosure will be described with reference to the drawings. - Inside the
case 100, thefirst wall 310 extending from oneside 110 of the case and spaced apart from theother side 120 of the case and thesecond wall 320 extending from theother side 120 of the case and spaced apart from oneside 110 of the case may be disposed alternately. In addition, thebattery cells 200 are coupled to and supported by thewall 300. The coolingoil 400 flowing into thecase 100 through theinlet 500 of thecase 100 circulates along thefirst wall 310 and thesecond wall 320 and directly contacts thebattery cells 200 to cool thebattery cells 200, and then flows out of thecase 100 through theoutlet 600 of thecase 100. In addition, anew cooling oil 400 may flow into thecase 100 again, or the coolingoil 400 flowing out of thecase 100 may be cooled through the heat transfer and then flow into thecase 100 again. Meanwhile, various methods may be used to circulate the coolingoil 400, and, for example, a pump may be combined. However, the circulation method of the coolingoil 400 is not limited thereto. -
FIG. 5 is a cross-sectioned view showing a battery module according to the second embodiment of the present disclosure, observed from the above. - Hereinafter, the function and effect of a
battery module 10 according to the second embodiment according to the present disclosure will be described with reference to the drawings, but features common to thebattery module 10 according to the first embodiment of the present disclosure will not be described again in detail. - The second embodiment of the present disclosure is different from the first embodiment in the point that a
single wall 300 is provided to form a channel. - Referring to
FIG. 5 , the coolingoil 400 flowing into thecase 100 through theinlet 500 of thecase 100 moves along thewall 300 to a side opposite to theinlet 500 of thecase 100 through the space between thebattery cells 200, and moves through the space formed between the side opposite to theinlet 500 of thecase 100 and thewall 300, and flows out of thecase 100 through theoutlet 600 of thecase 100. In this way, it is possible that the coolingoil 400 cools thebattery cells 200 in direct contact thereto. -
FIG. 6 is a perspective view showing an entire battery module according to the third embodiment of the present disclosure. - Hereinafter, the function and effect of a
battery module 10 according to the third embodiment according to the present disclosure will be described with reference to the drawings, but features common to thebattery module 10 according to the first and second embodiments of the present disclosure will not be described again in detail. - The third embodiment of the present disclosure is different from the first and second embodiments in the point that the
inlet 500 and theoutlet 600 formed at thecase 100 are provided in plural. - Since the cooling
oil 400 is a fluid, if theinlet 500 and theoutlet 600 are formed in single, the coolingoil 400 may not smoothly circulate depending on the size of thecase 100, or turbulence may be generated in the flow of the coolingoil 400 inside thecase 100. In order to solve this problem, a plurality ofinlets 500 andoutlets 600 may be formed at thecase 100. For example, as shown inFIG. 6 , theinlet 500 and theoutlet 600 are provided in plural, respectively, and they may be formed vertically based onFIG. 6 . Even though twoinlets 500 and twooutlets 600 are provided inFIG. 6 ,more inlets 500 andoutlets 600 may be used as necessary, without being limited to the above. In addition, the arrangement of theinlet 500 and theoutlet 600 is not limited to the vertical form but may be provided in more various ways. - Meanwhile, a battery pack (not shown) according to an embodiment of the present disclosure, may include one or
more battery modules 10 according to an embodiment of the present disclosure as described above. Also, in addition to thebattery modules 10, the battery pack (not shown) may further includes acase 100 for accommodating thebattery modules 10, and various devices for controlling charge and discharge of thebattery modules 10, such as a BMS, a current sensor, a fuse, and the like. - Meanwhile, a vehicle (not shown) according to an embodiment of the present disclosure may include the
battery module 10 or the battery pack (not shown) described above, and the battery pack (not shown) may include thebattery module 10. In addition, thebattery module 10 according to an embodiment of the present disclosure may be applied to the vehicle (not shown), for example, a predetermined vehicle (not shown) provided to use electricity like an electric vehicle or a hybrid electric vehicle. - The present disclosure has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the disclosure, are given by way of illustration only, since various changes and modifications within the scope of the disclosure will become apparent to those skilled in the art from this detailed description.
- The present disclosure is directed to a battery module and a battery pack including the battery module, and is particularly applicable to industries associated with a secondary battery.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020170045405A KR102258173B1 (en) | 2017-04-07 | 2017-04-07 | Battery module and battery pack including the same |
KR10-2017-0045405 | 2017-04-07 | ||
PCT/KR2018/000275 WO2018186562A1 (en) | 2017-04-07 | 2018-01-05 | Battery module and battery pack comprising same |
Publications (2)
Publication Number | Publication Date |
---|---|
US20200028131A1 true US20200028131A1 (en) | 2020-01-23 |
US10957955B2 US10957955B2 (en) | 2021-03-23 |
Family
ID=63713467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/337,771 Active 2038-06-07 US10957955B2 (en) | 2017-04-07 | 2018-01-05 | Battery module and battery pack including the same |
Country Status (4)
Country | Link |
---|---|
US (1) | US10957955B2 (en) |
KR (1) | KR102258173B1 (en) |
CN (1) | CN209880768U (en) |
WO (1) | WO2018186562A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210098842A1 (en) * | 2019-09-26 | 2021-04-01 | Mahle International Gmbh | Battery system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109640592A (en) * | 2018-12-29 | 2019-04-16 | 曙光节能技术(北京)股份有限公司 | A kind of radiator of electronic component |
KR20230092085A (en) * | 2021-12-16 | 2023-06-26 | 주식회사 동희산업 | Battery case and thermal management system with battery case |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09266016A (en) * | 1996-03-27 | 1997-10-07 | Toyota Autom Loom Works Ltd | Method for cooling cylindrical battery |
JP2001060466A (en) | 1999-08-23 | 2001-03-06 | Japan Storage Battery Co Ltd | Set battery |
JP2003017131A (en) | 2001-06-27 | 2003-01-17 | Japan Storage Battery Co Ltd | Manufacturing method of nonaqueous electrolyte secondary cell |
KR20070013455A (en) | 2005-07-26 | 2007-01-31 | 삼성에스디아이 주식회사 | Secondary battery module |
JP5221913B2 (en) | 2007-08-29 | 2013-06-26 | 本田技研工業株式会社 | Battery storage unit |
US20090061305A1 (en) | 2007-08-29 | 2009-03-05 | Honda Motor Co., Ltd. | Battery container unit |
KR101370238B1 (en) * | 2009-07-17 | 2014-03-14 | 파나소닉 주식회사 | Battery module and battery pack using the same |
KR101130043B1 (en) * | 2009-07-27 | 2012-03-28 | 주식회사 엘지화학 | Battery Module of Improved Cooling Efficiency |
KR101866345B1 (en) | 2011-12-02 | 2018-06-12 | 에스케이이노베이션 주식회사 | Battery Module |
JP2014060088A (en) | 2012-09-19 | 2014-04-03 | Toshiba Corp | Secondary battery device and secondary battery system |
KR20140057696A (en) | 2012-10-25 | 2014-05-14 | 황해룡 | Insulation liquid circulation cooling type secondary battery |
KR101743697B1 (en) | 2014-04-14 | 2017-06-20 | 주식회사 엘지화학 | Battery module having separated cooling path and venting path and battery pack including the same |
KR102321512B1 (en) | 2014-09-11 | 2021-11-04 | 현대모비스 주식회사 | Water-cooled battery cooling apparatus using water-cooled battery module |
KR102284486B1 (en) | 2015-01-30 | 2021-08-02 | 삼성에스디아이 주식회사 | Battery pack |
-
2017
- 2017-04-07 KR KR1020170045405A patent/KR102258173B1/en active IP Right Grant
-
2018
- 2018-01-05 CN CN201890000317.7U patent/CN209880768U/en active Active
- 2018-01-05 WO PCT/KR2018/000275 patent/WO2018186562A1/en active Application Filing
- 2018-01-05 US US16/337,771 patent/US10957955B2/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210098842A1 (en) * | 2019-09-26 | 2021-04-01 | Mahle International Gmbh | Battery system |
Also Published As
Publication number | Publication date |
---|---|
CN209880768U (en) | 2019-12-31 |
US10957955B2 (en) | 2021-03-23 |
KR102258173B1 (en) | 2021-06-08 |
KR20180113811A (en) | 2018-10-17 |
WO2018186562A1 (en) | 2018-10-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11217836B2 (en) | Cooling jacket having nonuniform flow paths, for cooling battery cell surface, and battery module including same | |
US11870046B2 (en) | Battery pack | |
EP2337112A1 (en) | Battery pack and vehicle including the battery pack | |
US8835036B2 (en) | Battery pack | |
CN108023135B (en) | Rechargeable battery and rechargeable battery module | |
US11777157B2 (en) | Battery module | |
KR20120102344A (en) | Battery pack | |
KR20120102343A (en) | Battery pack | |
CN109845024B (en) | Battery system and electric vehicle including the same | |
US10957955B2 (en) | Battery module and battery pack including the same | |
CN113939948A (en) | Battery module including unit frame | |
KR101761825B1 (en) | Battery module, and battery pack including the same | |
EP4184667A1 (en) | Battery module, and battery pack and vehicle comprising same | |
US10862180B2 (en) | Battery module and battery pack including same | |
EP4379909A1 (en) | Battery module, and battery pack and vehicle comprising same | |
CN216773348U (en) | Battery module, battery pack comprising same and automobile | |
JP7460773B2 (en) | Battery module, battery pack including same, and automobile | |
US20230420770A1 (en) | Battery Module, and Battery Pack and Vehicle Including the Same | |
CN117638293A (en) | Battery pack and vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: LG CHEM, LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RYU, JAE-UK;YOON, JI-SU;KANG, DAL-MO;AND OTHERS;REEL/FRAME:048739/0188 Effective date: 20180619 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: LG ENERGY SOLUTION, LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LG CHEM, LTD.;REEL/FRAME:058295/0068 Effective date: 20211027 |